Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

Future minimum lease payments

As of December 31, 2016, future minimum payments under non-cancelable operating leases, net of sublease income amounts, were as follows over each of the next five years and thereafter (in millions):

	Operating Leases		Sub-lease Income		Net Operating Leases
2017	843		15		828
2018	902		6		896
2019	910		5		905
2020	854		4		850
2021	767		2		765
Thereafter	3,694		1		3,693
Total minimum payments	$	7,970	$	33	$	7,937