Debt instrument, principal amount threshold guaranteed by subsidiaries.

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- Definition

Debt instrument redemption price percentage of principal amount excluding redemption date.

+ References

No definition available.

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- Definition

Debt instrument redemption price percentage of principal amount from net cash proceeds.

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- Definition

Debt instrument, redemption price, percentage of principal amount redeemed in event of asset dispositions.

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- Definition

Debt instrument, redemption price, percentage of principal amount redeemed in event of change of contract.

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Debt instrument, redemption price, percentage of principal amount redeemed in event of change of control.

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- Definition

Number of tender offers.

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- Definition

Tender offer aggregate purchase price.

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- Definition

Tender offer expiration date.

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- Definition

Tender offer principal amount price per share.

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Tender offer purchase price per share.

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- Definition

Tender offer to purchase accrued interest.

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- Definition

Tender offer to purchase premium amount.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Description of the payment terms of the debt instrument (for example, whether periodic payments include principal and frequency of payments) and discussion about any contingencies associated with the payment.

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Percentage of principal amount of debt redeemed.

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No definition available.

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Face (par) amount of the original debt instrument that was repurchased.

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Amount, after accumulated amortization, of debt discount.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Amount of cash outflow reducing loss contingency liability.

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Costs incurred during the period, such as those relating to general administration and policy maintenance that do not vary with and are not primarily related to the acquisition or renewal of insurance contracts.

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- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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Debt - Senior Unsecured Notes - Narrative (Details)							12 Months Ended
Debt - Senior Unsecured Notes - Narrative (Details)	Nov. 27, 2020 USD ($)	Nov. 12, 2020 $ / shares	Jun. 06, 2018 EUR (€)	May 21, 2018 USD ($) Tender $ / shares	May 23, 2017 USD ($)	May 12, 2015 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2020 EUR (€)	Dec. 01, 2020 USD ($)	Dec. 31, 2019 EUR (€)	Jun. 08, 2018 EUR (€)	Jun. 06, 2018 USD ($)	Jun. 06, 2018 EUR (€)	May 12, 2015 EUR (€)
Debt Instrument [Line Items]
Debt instrument net issue discount							$ 7,000,000	$ 8,000,000
Loss on extinguishment of debt							$ (22,000,000)	0	$ (38,000,000)
First MDL Settlement [Member]
Debt Instrument [Line Items]
Settlement payments					$ 335,000,000
6.625% Senior Unsecured Notes Due May 2023 [Member]
Debt Instrument [Line Items]
Long-term debt								$ 908,000,000
Debt instrument interest rate							6.625%	6.625%		6.625%		6.625%
4.000% Senior Unsecured Notes Due May 2026 [Member]
Debt Instrument [Line Items]
Long-term debt							$ 551,000,000	$ 501,000,000		€ 450,000,000		€ 450,000,000
Debt instrument interest rate							4.00%	4.00%		4.00%		4.00%
5.750% Senior Unsecured Notes Due November 2028 [Member]
Debt Instrument [Line Items]
Long-term debt							$ 800,000,000
Debt instrument interest rate							5.75%	5.75%		5.75%		5.75%
Senior unsecured notes [Member]
Debt Instrument [Line Items]
Long-term debt						$ 2,503,000,000
Senior unsecured notes, payment terms							The Original Notes required or require, as applicable, payment of principal at maturity and payments of interest semi-annually in cash and in arrears on May 15 and November 15 of each year.
Net proceeds from issuance of long term debt					489,000,000
Senior unsecured notes [Member] \| 2026 Euro Notes [Member]
Debt Instrument [Line Items]
Net proceeds from offering \| €			€ 445,000,000
Senior unsecured notes [Member] \| Redemption of 2023 Euro Notes and Issuance of 2026 Euro Notes [Member]
Debt Instrument [Line Items]
Loss on extinguishment of debt									35,000,000
Senior unsecured notes [Member] \| Dollar Tender Offer [Member]
Debt Instrument [Line Items]
Tender offer aggregate purchase price											$ 926,000,000			$ 264,000,000
Tender offer early participation premium											16,000,000			13,000,000
Tender offer accrued interest											$ 2,000,000			$ 1,000,000
Senior unsecured notes [Member] \| Euro Tender Offer [member]
Debt Instrument [Line Items]
Tender offer aggregate purchase price \| €													€ 310,000,000
Tender offer early participation premium \| €													14,000,000
Tender offer accrued interest \| €													€ 1,000,000
Senior unsecured notes [Member] \| 2028 Notes [Member]
Debt Instrument [Line Items]
Net proceeds from offering	$ 790,000,000
Senior unsecured notes [Member] \| Redemption of 2023 Dollar Notes [Member]
Debt Instrument [Line Items]
Loss on extinguishment of debt							$ 22,000,000
Senior unsecured notes [Member] \| 6.625% Senior Unsecured Notes Due May 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, face amount						$ 1,350,000,000
Debt instrument interest rate						6.625%										6.625%
Debt instrument maturity date						May 31, 2023
Debt instrument outstanding amount				$ 250,000,000			$ 908,000,000		$ 250,000,000
Number of tender offers \| Tender				2
Senior unsecured notes [Member] \| 6.625% Senior Unsecured Notes Due May 2023 [Member] \| Dollar Tender Offer [Member] \| Tender Offer Purchase Price One [Member]
Debt Instrument [Line Items]
Tender offer purchase price per share \| $ / shares		$ 1,017.94		$ 1,052.50
Tender offer principal amount price per share		1,000.00		1,000.00
Tender offer expiration date		Nov. 25, 2020		Jun. 04, 2018
Senior unsecured notes [Member] \| 6.625% Senior Unsecured Notes Due May 2023 [Member] \| Dollar Tender Offer [Member] \| Tender Offer Purchase Price Two [Member]
Debt Instrument [Line Items]
Tender offer purchase price per share \| $ / shares		$ 987.94		$ 1,022.50
Tender offer principal amount price per share		1,000.00		1,000.00
Tender offer expiration date		Dec. 10, 2020		Jun. 18, 2018
Senior unsecured notes [Member] \| 6.625% Senior Unsecured Notes Due May 2023 [Member] \| 2028 Notes [Member]
Debt Instrument [Line Items]
Debt instrument outstanding amount				$ 908,000,000
Senior unsecured notes [Member] \| 2025 Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, face amount						$ 750,000,000
Debt instrument interest rate						7.00%										7.00%
Debt instrument maturity date						May 31, 2025
Senior unsecured notes [Member] \| Senior Notes 6.125% Due May 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, face amount \| €																€ 360,000,000
Debt instrument interest rate						6.125%										6.125%
Debt instrument maturity date						May 31, 2023
Senior unsecured notes [Member] \| Senior Notes 6.125% Due May 2023 [Member] \| Euro Tender Offer [member] \| Tender Offer Purchase Price One [Member]
Debt Instrument [Line Items]
Tender offer purchase price per share \| $ / shares				$ 1,048.75
Tender offer principal amount price per share				1,000.00
Tender offer expiration date				Jun. 04, 2018
Senior unsecured notes [Member] \| Senior Notes 6.125% Due May 2023 [Member] \| Euro Tender Offer [member] \| Tender Offer Purchase Price Two [Member]
Debt Instrument [Line Items]
Tender offer purchase price per share \| $ / shares				$ 1,018.75
Tender offer principal amount price per share				1,000.00
Tender offer expiration date				Jun. 18, 2018
Senior unsecured notes [Member] \| Original Notes [Member]
Debt Instrument [Line Items]
Obligation threshold for debt to become guaranteed						$ 75,000,000
Repurchase price obligation, percentage of principal amount redeemed in event of change of control						101.00%										101.00%
Repurchase price obligation, percentage of principal amount redeemed in event of change of asset dispositions						100.00%										100.00%
Senior unsecured notes [Member] \| 2027 Notes [Member]
Debt Instrument [Line Items]
Long-term debt					$ 500,000,000
Debt instrument interest rate					5.375%
Obligation threshold for debt to become guaranteed					$ 100,000,000
Debt instrument net issue discount					5,000,000
Underwriting fees and other related expenses					$ 6,000,000
Repurchase price obligation, percentage of principal amount redeemed in event of change of control					101.00%
Repurchase price obligation, percentage of principal amount redeemed					100.00%
Senior unsecured notes [Member] \| 4.000% Senior Unsecured Notes Due May 2026 [Member] \| 2026 Euro Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, face amount \| €															€ 450,000,000
Debt instrument interest rate														4.00%	4.00%
Debt instrument maturity date			May 31, 2026
Senior unsecured notes, payment terms							The 2026 Euro Notes require payment of principal at maturity and payments of interest semi-annually in cash and in arrears on May 15 and November 15 of each year.
Repurchase price obligation, percentage of principal amount redeemed in event of change of control														101.00%	101.00%
Repurchase price obligation, percentage of principal amount redeemed			100.00%
Debt instrument redemption price percentage of principal amount with net cash proceeds														35.00%	35.00%
Debt instrument redemption price percentage of principal amount excluding redemption date														104.00%	104.00%
Senior unsecured notes [Member] \| 4.000% Senior Unsecured Notes Due May 2026 [Member] \| Minimum [Member] \| 2026 Euro Notes [Member]
Debt Instrument [Line Items]
Obligation threshold for debt to become guaranteed														$ 100,000,000
Senior unsecured notes [Member] \| 5.750% Senior Unsecured Notes Due November 2028 [Member] \| 2028 Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, face amount	$ 800,000,000
Debt instrument interest rate	5.75%
Debt instrument maturity date	Nov. 30, 2028
Senior unsecured notes, payment terms							The 2028 Notes require payment of principal at maturity and interest semi-annually in cash and in arrears on May 15 and November 15 of each year.
Underwriting fees and other related expenses	$ 10,000,000
Repurchase price obligation, percentage of principal amount redeemed in event of change of control	101.00%
Repurchase price obligation, percentage of principal amount redeemed	100.00%
Debt instrument redemption price percentage of principal amount with net cash proceeds	35.00%
Debt instrument redemption price percentage of principal amount excluding redemption date	105.75%
Senior unsecured notes [Member] \| 5.750% Senior Unsecured Notes Due November 2028 [Member] \| Minimum [Member] \| 2028 Notes [Member]
Debt Instrument [Line Items]
Obligation threshold for debt to become guaranteed	$ 100,000,000