CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Current Assets:
Allowance for Uncollectible Accounts	$ 113	$ 108
Shareholders' Equity:
Common Shares, Par Value (in USD per share)	$ 0.001	$ 0.001
Common Shares, Authorized (in shares)	1,356,000,000	1,356,000,000
Common Shares, Conditionally Authorized (in shares)	0	0
Common Shares, Issued (in shares)	779,000,000	774,000,000
Common Shares, Outstanding (in shares)	779,000,000	774,000,000
Treasury Shares, at cost (in shares)	0	0