Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Shareholder’s Equity
Common shares, par value (in dollars per share)	$ 0.10	$ 0.10
Common shares, authorized	3,000,000	3,000,000
Common shares, issued	1,500,000	1,500,000
Common shares, outstanding	1,500,000	1,500,000
Accumulated other comprehensive income (loss)
Foreign currency translation adjustments, tax	$ 7	$ 5
Card Member Receivables
Assets
Financing receivables, reserves for credit losses	30	70
Card Member Loans
Assets
Financing receivables, reserves for credit losses	$ 24	$ 20