CONSOLIDATED BALANCE SHEET (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 6.375 percent Mandatory Convertible Preference Shares, Series A	Dec. 31, 2012 6.375 percent Mandatory Convertible Preference Shares, Series A
Receivables, discounts and allowances	$ 6	$ 7
Property and equipment, accumulated depreciation	$ 6,368	$ 6,388
Preference shares, par value			$ 1.00	$ 1.00
Preference shares, liquidation			$ 50.00	$ 0.00
Preference shares, authorized			40,000,000	40,000,000
Preference shares, issued			13,800,000	0
Preference shares, outstanding			13,800,000	0
Common shares, par value	$ 1.25	$ 1.25
Common shares, authorized	1,360,000,000	1,360,000,000
Common shares, issued	583,548,428	542,392,642
Common shares, outstanding	583,548,428	542,392,642