Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Current Assets
Allowance for doubtful accounts receivable, current	$ 82	$ 77
Shareholders’ Equity
Common Stock, Par Value (in dollars per share)	$ 1	$ 1
Common Stock, Shares Authorized (in shares)	2,000,000,000	2,000,000,000
Common Stock, Shares Issued (in shares)	1,465,706,360	1,465,706,360