Pension, Postretirement and Savings Plans Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Total expense related to defined contribution plans	$ 204	$ 175	$ 150
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Projected benefit obligation increase (decrease)	$ (204)	$ (8)
Healthcare cost trend rate assumed for next year	6.50%	6.75%
Ultimate trend rate	5.00%	5.00%
Year that the rate reaches the ultimate trend rate	6 years	7 years
Plan assets at fair value	$ 391	$ 637
2023	28
2024	20
2025	19
2026	18
2027	25
2028 - 2032	114
Cash and cash equivalents
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value	43	246
Mutual funds
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value	234	287
Insurance contracts
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value	114	104
Other Postretirement Benefits Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation, beginning	62	70
Service cost	1	1	1
Interest cost	2	2	2
Actuarial (gain) loss	(16)	(7)
Benefits paid	(6)	(4)
Transfers in	0	0
Foreign currency translation	0	0
Benefit Obligation, ending	43	62	70
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Actual gain/(loss) on plan assets	0	0
Employer contributions	6	4
Benefits paid	(6)	(4)
Transfers in	0	0
Foreign currency translation	0	0
Funded status at end of year	(43)	(62)
Noncurrent assets	0	0
Other liabilities, short-term	(3)	(3)
Other liabilities, long-term	(40)	(59)
Total amounts recognized on the consolidated balance sheet	(43)	(62)
Net actuarial (gain) loss	(14)	2
Prior service credit	(1)	(2)
Balance at end of year	$ (15)	$ 0
Weighted-average assumptions used to determine end of year benefit obligations, Discount Rate	5.50%	2.75%
Weighted-average assumptions used to determine end of year benefit obligations, rate of compensation increase	3.00%	3.00%
Expected return on plan assets	$ 0	$ 0	0
Amortization of actuarial loss	0	0	0
Amortization of prior service credit	(1)	(1)	(1)
Net periodic benefit cost	2	2	2
Current year actuarial loss (gain)	(16)	(7)	7
Amortization of prior service credit	1	2	1
Total other comprehensive loss (income)	(15)	(5)	8
Total net periodic benefit cost and other comprehensive loss (income)	$ (13)	$ (3)	$ 10
Weighted-average assumptions used to determine end of year net periodic benefit, Discount rate	2.75%	2.50%	3.25%
Weighted-average assumptions used to determine end of year net periodic benefit, Rate of compensation increase	3.00%	3.00%	3.00%
Plan assets at fair value	$ 0	$ 0	$ 0
2023	3
2024	3
2025	3
2026	3
2027	4
2028 - 2032	18
Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation, beginning	596	604
Service cost	12	14	13
Interest cost	9	9	9
Actuarial (gain) loss	(156)	(6)
Benefits paid	(16)	(17)
Transfers in	5	4
Foreign currency translation	(58)	(12)
Benefit Obligation, ending	392	596	604
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Actual gain/(loss) on plan assets	(203)	63
Employer contributions	25	32
Benefits paid	(16)	(17)
Transfers in	5	4
Foreign currency translation	(69)	(11)
Funded status at end of year	38	92
Noncurrent assets	44	105
Other liabilities, short-term	0	0
Other liabilities, long-term	(6)	(13)
Total amounts recognized on the consolidated balance sheet	38	92
Net actuarial (gain) loss	23	(38)
Prior service credit	1	1
Balance at end of year	24	(37)
Projected benefit obligation	392	596
Accumulated benefit obligation	388	592
Fair value of plan assets	430	688
Expected return on plan assets	(14)	(19)	(18)
Amortization of actuarial loss	0	(1)	0
Amortization of prior service credit	0	0	0
Net periodic benefit cost	7	3	4
Current year actuarial loss (gain)	61	(50)	5
Amortization of prior service credit	0	0	0
Total other comprehensive loss (income)	61	(50)	5
Total net periodic benefit cost and other comprehensive loss (income)	68	(47)	9
Plan assets at fair value	$ 430	$ 688	$ 617
Pension Plan | Foreign Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Weighted-average assumptions used to determine end of year benefit obligations, Discount Rate	3.80%	0.90%
Weighted-average assumptions used to determine end of year benefit obligations, rate of compensation increase	1.50%	1.50%
Weighted-average assumptions used to determine end of year net periodic benefit, Discount rate	0.90%	0.70%	0.70%
Weighted-average assumptions used to determine end of year net periodic benefit, Expected return on plan assets	1.60%	1.60%	1.60%
Weighted-average assumptions used to determine end of year net periodic benefit, Rate of compensation increase	1.50%	1.50%	1.50%
Fair Value, Inputs, Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value	$ 149	$ 431
Fair Value, Inputs, Level 1 | Cash and cash equivalents
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value	43	246
Fair Value, Inputs, Level 1 | Mutual funds
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value	106	185
Fair Value, Inputs, Level 1 | Insurance contracts
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value	0	0
Fair Value, Inputs, Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value	242	206
Fair Value, Inputs, Level 2 | Cash and cash equivalents
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value	0	0
Fair Value, Inputs, Level 2 | Mutual funds
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value	128	102
Fair Value, Inputs, Level 2 | Insurance contracts
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value	114	104
Fair Value, Inputs, Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value	0	0
Fair Value, Inputs, Level 3 | Cash and cash equivalents
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value	0	0
Fair Value, Inputs, Level 3 | Mutual funds
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value	0	0
Fair Value, Inputs, Level 3 | Insurance contracts
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value	0	0
Investments at Net Asset Value (NAV)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Total Plan Assets	$ 430	$ 688
Vocalink Plan | Non-government fixed income
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (percent)	18.00%
Vocalink Plan | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (percent)	14.00%
Vocalink Plan | Government and agency securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (percent)	41.00%
Vocalink Plan | Other
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (percent)	11.00%
Vocalink Plan | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (percent)	16.00%
Vocalink Plan | Pension Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Weighted-average assumptions used to determine end of year benefit obligations, Discount Rate	4.80%	1.75%
Weighted-average assumptions used to determine end of year benefit obligations, rate of compensation increase	2.70%	3.20%
Weighted-average assumptions used to determine end of year net periodic benefit, Discount rate	1.75%	1.55%	1.55%
Weighted-average assumptions used to determine end of year net periodic benefit, Expected return on plan assets	2.30%	3.20%	3.20%
Weighted-average assumptions used to determine end of year net periodic benefit, Rate of compensation increase	3.20%	2.75%	2.75%
Pension Plans with Benefit Obligations in Excess of Plan Assets | Pension Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Projected benefit obligation	$ 8	$ 116
Accumulated benefit obligation	6	115
Fair value of plan assets	2	104
Mutual funds | Investments at Net Asset Value (NAV)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Alternative Investment	$ 39	$ 51