Changes in Accumulated Other Comprehensive Income (Tables)

6 Months Ended

Jun. 30, 2019

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 six months endedJune 30, 2019 and 2018 were as follows:

		Foreign
		Currency
		Translation
		Adjustments
Three Months Ended June 30, 2019 (Millions), net of tax		Gains (Losses)
Balances as of March 31, 2019	$	(1,053)
Net translation loss of investments in foreign operations		(58)
Net gains related to hedges of investment in foreign operations		36
Net change in accumulated other comprehensive loss		(22)
Balances as of June 30, 2019	$	(1,075)
		Foreign
		Currency
		Translation
		Adjustments
Six Months Ended June 30, 2019 (Millions), net of tax		Gains (Losses)
Balances as of December 31, 2018	$	(1,060)
Net translation gain of investments in foreign operations		6
Net losses related to hedges of investment in foreign operations		(21)
Net change in accumulated other comprehensive loss		(15)
Balances as of June 30, 2019	$	(1,075)
		Foreign
		Currency
		Translation
		Adjustments
Three Months Ended June 30, 2018 (Millions), net of tax		Gains (Losses)
Balances as of March 31, 2018	$	(988)
Net translation loss of investments in foreign operations		(126)
Net gains related to hedges of investment in foreign operations		105
Net change in accumulated other comprehensive loss		(21)
Balances as of June 30, 2018	$	(1,009)
		Foreign
		Currency
		Translation
		Adjustments
Six Months Ended June 30, 2018 (Millions), net of tax		Gains (Losses)
Balances as of December 31, 2017	$	(998)
Net translation loss of investments in foreign operations(a)		(73)
Net gains related to hedges of investment in foreign operations		62
Net change in accumulated other comprehensive loss		(11)
Balances as of June 30, 2018	$	(1,009)

Accumulated Other Comprehensive Loss Income - Tax Effect

The following table shows the tax impact for the three and six months endedJune 30 for the changes in Foreign Currency Translation Adjustments presented above:

		Tax (benefit) expense
		Three Months Ended				Six Months Ended
		June 30,				June 30,
(Millions)		2019		2018		2019		2018
Net translation on investments in foreign operations	$	―	$	(23)	$	3	$	(31)
Net hedges on investments in foreign operations		12		33		(6)		19
Total tax impact	$	12	$	10	$	(3)	$	(12)