Changes in Accumulated Other Comprehensive Income (Tables)

9 Months Ended

Sep. 30, 2016

Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]

Components of comprehensive income (loss), net of tax

Changes in Foreign Currency Translation Adjustments for the three and nine months endedSeptember 30, 2016 and 2015were as follows:

		Foreign
		Currency
		Translation
Three Months Ended September 30, 2016 (Millions), net of tax		Adjustments
Balances as of June 30, 2016	$	(1,188)
Net translation gain of investments in foreign operations		30
Net losses related to hedges of investment in foreign operations		(29)
Net change in accumulated other comprehensive loss		1
Balances as of September 30, 2016	$	(1,187)
		Foreign
		Currency
		Translation
Nine Months Ended September 30, 2016 (Millions), net of tax		Adjustments
Balances as of December 31, 2015	$	(1,156)
Net translation loss of investments in foreign operations		(3)
Net losses related to hedges of investment in foreign operations		(28)
Net change in accumulated other comprehensive loss		(31)
Balances as of September 30, 2016	$	(1,187)
		Foreign
		Currency
		Translation
Three Months Ended September 30, 2015 (Millions), net of tax		Adjustments
Balances as of June 30, 2015	$	(941)
Net translation loss of investments in foreign operations		(376)
Net gains related to hedges of investment in foreign operations		188
Net change in accumulated other comprehensive loss		(188)
Balances as of September 30, 2015	$	(1,129)
		Foreign
		Currency
		Translation
Nine Months Ended September 30, 2015 (Millions), net of tax		Adjustments
Balances as of December 31, 2014	$	(787)
Net translation loss of investments in foreign operations		(616)
Net gains related to hedges of investment in foreign operations		274
Net change in accumulated other comprehensive loss		(342)
Balances as of September 30, 2015	$	(1,129)