Changes in Accumulated Other Comprehensive Loss (Tables)

12 Months Ended

Dec. 31, 2020

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

Components of comprehensive loss, net of tax

Changes in Foreign Currency Translation Adjustments for the three years ended December 31 were as follows:

(Millions), net of tax	Foreign Currency Translation Adjustment (losses) gains
Balance as of December 31, 2017	$	(998)
Net translation on investments in foreign operations	(189)
Net hedges of investments in foreign operations	127
Net change in accumulated other comprehensive loss	(62)
Balances as of December 31, 2018	(1,060)
Net translation on investments in foreign operations	17
Net hedges of investments in foreign operations	(44)
Net change in accumulated other comprehensive loss	(27)
Balances as of December 31, 2019	(1,087)
Net translation on investments in foreign operations	119
Net hedges of investments in foreign operations	(131)
Net change in accumulated other comprehensive loss	(12)
Balances as of December 31, 2020	$	(1,099)

Foreign currency translation adjustments - tax effect

The following table shows the tax impact for the three years ended December 31 for the changes in Foreign Currency Translation Adjustments presented above:

	Tax expense (benefit)
(Millions)	2020		2019		2018
Net translation on investments in foreign operations	$	21	$	5	$	(23)
Net hedges of investments in foreign operations	(41)		(14)		40
Total tax impact	$	(20)	$	(9)	$	17