Share Repurchase Plan (Tables)

12 Months Ended

Dec. 31, 2016

Equity [Abstract]

Schedule of Share Repurchases Under Share Repurchase Plan

Repurchases under this program to date have been as follows:

	2016		2015		2014		To Date
	(In millions)
Total cost of shares repurchased	$	—	$	91	$	3,722	$	5,351
Total number of shares repurchased		—		1.45		43.35		64.11