Equity (Dividends Distributed to the Company's Shareholders) (Details) - USD ($)
$ / shares in Units, $ in Millions

3 Months Ended

12 Months Ended

Mar. 31, 2022

Dec. 31, 2021

Dec. 31, 2020

Dec. 31, 2019

Disclosure of terms and conditions of share-based payment arrangement [line items]

Gross amount of the dividend distributed (in millions of $)

$ 276

$ 118

$ 277

Net amount of the distribution (net of the subsidiariy's share) (in millions of $)

$ 276

$ 118

$ 273

Amount of the dividend per share (in dollar)

$ 0.21

$ 0.09

$ 0.22

February 4, 2019 [Member]

Disclosure of terms and conditions of share-based payment arrangement [line items]

Actual date of distribution of the dividend

Mar. 13, 2019

Gross amount of the dividend distributed (in millions of $)

$ 62

Net amount of the distribution (net of the subsidiariy's share) (in millions of $)

$ 61

Amount of the dividend per share (in dollar)

$ 0.05

May 6, 2019 [Member]

Disclosure of terms and conditions of share-based payment arrangement [line items]

Actual date of distribution of the dividend

Jun. 19, 2019

Gross amount of the dividend distributed (in millions of $)

$ 76

Net amount of the distribution (net of the subsidiariy's share) (in millions of $)

$ 75

Amount of the dividend per share (in dollar)

$ 0.06

July 30, 2019 [Member]

Disclosure of terms and conditions of share-based payment arrangement [line items]

Actual date of distribution of the dividend

Sep. 24, 2019

Gross amount of the dividend distributed (in millions of $)

$ 74

Net amount of the distribution (net of the subsidiariy's share) (in millions of $)

$ 73

Amount of the dividend per share (in dollar)

$ 0.06

November 5, 2019 [Member]

Disclosure of terms and conditions of share-based payment arrangement [line items]

Actual date of distribution of the dividend

Dec. 18, 2019

Gross amount of the dividend distributed (in millions of $)

$ 65

Net amount of the distribution (net of the subsidiariy's share) (in millions of $)

$ 64

Amount of the dividend per share (in dollar)

$ 0.05

February 11, 2020 [Member]

Disclosure of terms and conditions of share-based payment arrangement [line items]

Actual date of distribution of the dividend

Mar. 18, 2020

Gross amount of the dividend distributed (in millions of $)

$ 23

Net amount of the distribution (net of the subsidiariy's share) (in millions of $)

$ 23

Amount of the dividend per share (in dollar)

$ 0.02

May 10, 2020 [Member]

Disclosure of terms and conditions of share-based payment arrangement [line items]

Actual date of distribution of the dividend

Jun. 17, 2020

Gross amount of the dividend distributed (in millions of $)

$ 30

Net amount of the distribution (net of the subsidiariy's share) (in millions of $)

$ 30

Amount of the dividend per share (in dollar)

$ 0.02

July 27, 2020 [Member]

Disclosure of terms and conditions of share-based payment arrangement [line items]

Actual date of distribution of the dividend

Sep. 16, 2020

Gross amount of the dividend distributed (in millions of $)

$ 36

Net amount of the distribution (net of the subsidiariy's share) (in millions of $)

$ 36

Amount of the dividend per share (in dollar)

$ 0.03

November 10, 2020 [Member]

Disclosure of terms and conditions of share-based payment arrangement [line items]

Actual date of distribution of the dividend

Dec. 16, 2020

Gross amount of the dividend distributed (in millions of $)

$ 29

Net amount of the distribution (net of the subsidiariy's share) (in millions of $)

$ 29

Amount of the dividend per share (in dollar)

$ 0.02

February 10, 2021 [Member]

Disclosure of terms and conditions of share-based payment arrangement [line items]

Actual date of distribution of the dividend

Mar. 16, 2021

Gross amount of the dividend distributed (in millions of $)

$ 34

Net amount of the distribution (net of the subsidiariy's share) (in millions of $)

$ 34

Amount of the dividend per share (in dollar)

$ 0.03

May 5, 2021 [Member]

Disclosure of terms and conditions of share-based payment arrangement [line items]

Actual date of distribution of the dividend

Jun. 16, 2021

Gross amount of the dividend distributed (in millions of $)

$ 67

Net amount of the distribution (net of the subsidiariy's share) (in millions of $)

$ 67

Amount of the dividend per share (in dollar)

$ 0.05

July 27, 2021 [Member]

Disclosure of terms and conditions of share-based payment arrangement [line items]

Actual date of distribution of the dividend

Sep. 01, 2021

Gross amount of the dividend distributed (in millions of $)

$ 68

Net amount of the distribution (net of the subsidiariy's share) (in millions of $)

$ 68

Amount of the dividend per share (in dollar)

$ 0.05

November 3, 2021 [Member]

Disclosure of terms and conditions of share-based payment arrangement [line items]

Actual date of distribution of the dividend

Dec. 15, 2021

Gross amount of the dividend distributed (in millions of $)

$ 107

Net amount of the distribution (net of the subsidiariy's share) (in millions of $)

$ 107

Amount of the dividend per share (in dollar)

$ 0.08

February 11, 2022 [Member]

Disclosure of terms and conditions of share-based payment arrangement [line items]

Actual date of distribution of the dividend

Mar. 08, 2022

Gross amount of the dividend distributed (in millions of $)

$ 169

Net amount of the distribution (net of the subsidiariy's share) (in millions of $)

$ 169

Amount of the dividend per share (in dollar)

$ 0.13