Nevada, Inc. reported the following items in the 2017 pension footnote (in millions).

Service cost	$1,171
Benefits paid to retirees	186
Interest cost	930
Actual returns on invested assets	1,204
Expected returns on invested assets	1,358
Actuarial loss	50

The increase in the company's pension obligation during the year is:

	A.	$ 661 million
	B.	$1,793 million
	C.	$ 506 million
	D.	$1,965 million
	E.	$1,948 million