Accumulated Other Comprehensive Income (Loss)

6 Months Ended

Jun. 30, 2021

Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]

Accumulated Other Comprehensive Income (Loss)

Note 19. Accumulated Other Comprehensive Income (Loss)

Changes in Accumulated Other Comprehensive Income (Loss) by Component

	Foreign Exchange Translation Adjustment			Changes in Fair Value of Effective Cash Flow Hedges			Pension Adjustments			Total Accumulated Other Comprehensive Income (Loss)
	(Dollars in millions)
Balance at December 31, 2019	$	153		$	4		$	(27	)	$	130
Other comprehensive income (loss) before    reclassifications		(11	)		(2	)		—			(13	)
Amounts reclassified from accumulated other    comprehensive income (loss)		—			—			—
Net current period other comprehensive income (loss)		(11	)		(2	)		—			(13	)
Balance at June 30, 2020	$	142		$	2		$	(27	)	$	117

	Foreign Exchange Translation Adjustment			Changes in Fair Value of Effective Cash Flow Hedges			Changes in Fair Value of Net Investment Hedges		Pension Adjustments			Total Accumulated Other Comprehensive Income (Loss)
	(Dollars in millions)
Balance at December 31, 2020	$	(81	)	$	(3	)	$	—	$	(45	)	$	(129	)
Other comprehensive income (loss) before    reclassifications		43			2			15		—			60
Amounts reclassified from accumulated other    comprehensive income (loss)		—			3			—		—			3
Net current period other comprehensive income (loss)		43			5			15		—			63
Balance at June 30, 2021	$	(38	)	$	2		$	15	$	(45	)	$	(66	)