Other Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Sep. 30, 2021	Dec. 31, 2020
Other assets
Long-term pension assets		$ 569	$ 562
Investments in affiliates		182	321
Right-of-use operating lease assets		406	302
Long-term deferred tax assets		154	227
Other		595	447
Other Assets		1,906	$ 1,859
Share of equity method losses	$ 30
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Operations In South Korea [Member]
Other assets
Consideration for the sale of business		$ 120