Debt (Details) In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2012 USD ($)	Dec. 31, 2011 USD ($)	Sep. 30, 2011 USD ($)	Sep. 30, 2012 Secured Credit Agreement USD ($)	Sep. 30, 2012 Revolving Loans USD ($)	Sep. 30, 2011 Revolving Loans USD ($)	Sep. 30, 2012 Term Loan A (119 million AUD at September 30, 2012) USD ($)	Sep. 30, 2012 Term Loan A (119 million AUD at September 30, 2012) AUD	Dec. 31, 2011 Term Loan A (119 million AUD at September 30, 2012) USD ($)	Sep. 30, 2011 Term Loan A (119 million AUD at September 30, 2012) USD ($)	Sep. 30, 2012 Term Loan B USD ($)	Dec. 31, 2011 Term Loan B USD ($)	Sep. 30, 2011 Term Loan B USD ($)	Sep. 30, 2012 Term Loan C (110 million CAD at September 30, 2012) USD ($)	Sep. 30, 2012 Term Loan C (110 million CAD at September 30, 2012) CAD	Dec. 31, 2011 Term Loan C (110 million CAD at September 30, 2012) USD ($)	Sep. 30, 2011 Term Loan C (110 million CAD at September 30, 2012) USD ($)	Sep. 30, 2012 Term Loan D (134 million EUR at September 30, 2012) USD ($)	Sep. 30, 2012 Term Loan D (134 million EUR at September 30, 2012) EUR (€)	Dec. 31, 2011 Term Loan D (134 million EUR at September 30, 2012) USD ($)	Sep. 30, 2011 Term Loan D (134 million EUR at September 30, 2012) USD ($)	Sep. 30, 2012 Senior Notes 3.00%, Exchangeable, due 2015 USD ($)	Dec. 31, 2011 Senior Notes 3.00%, Exchangeable, due 2015 USD ($)	Sep. 30, 2011 Senior Notes 3.00%, Exchangeable, due 2015 USD ($)	Sep. 30, 2012 Senior Notes 7.375%, due 2016 USD ($)	Dec. 31, 2011 Senior Notes 7.375%, due 2016 USD ($)	Sep. 30, 2011 Senior Notes 7.375%, due 2016 USD ($)	Sep. 30, 2012 Senior Notes 6.875%, due 2017 (300 million EUR) USD ($)	Sep. 30, 2012 Senior Notes 6.875%, due 2017 (300 million EUR) EUR (€)	Dec. 31, 2011 Senior Notes 6.875%, due 2017 (300 million EUR) USD ($)	Sep. 30, 2011 Senior Notes 6.875%, due 2017 (300 million EUR) USD ($)	Sep. 30, 2012 Senior Notes 6.75%, due 2020 (500 million EUR) USD ($)	Sep. 30, 2012 Senior Notes 6.75%, due 2020 (500 million EUR) EUR (€)	Dec. 31, 2011 Senior Notes 6.75%, due 2020 (500 million EUR) USD ($)	Sep. 30, 2011 Senior Notes 6.75%, due 2020 (500 million EUR) USD ($)	Sep. 30, 2012 Senior Debentures 7.80%, due 2018 USD ($)	Dec. 31, 2011 Senior Debentures 7.80%, due 2018 USD ($)	Sep. 30, 2011 Senior Debentures 7.80%, due 2018 USD ($)	Sep. 30, 2012 Other debt USD ($)	Dec. 31, 2011 Other debt USD ($)	Sep. 30, 2011 Other debt USD ($)	Sep. 30, 2012 Accounts Receivable Securitization Programs USD ($)	Dec. 31, 2011 Accounts Receivable Securitization Programs USD ($)	Sep. 30, 2011 Accounts Receivable Securitization Programs USD ($)	Sep. 30, 2012 European Accounts Receivable Securitization Program EUR (€)	Jun. 30, 2011 Senior Notes 6.75%, due 2014
Debt Instrument
Total long-term debt	$ 3,574	$ 3,703	$ 3,793			$ 30	$ 125	119	$ 173	$ 166	$ 548	$ 600	$ 600	$ 113	110	$ 114	$ 112	$ 173	€ 134	$ 182	$ 191	$ 637	$ 624	$ 620	$ 590	$ 588	$ 587	$ 388	€ 300	$ 388	$ 406	$ 647	€ 500	$ 647	$ 677	$ 250	$ 250	$ 250	$ 103	$ 137	$ 154
Less amounts due within one year	37	76	50
Long-term debt	3,537	3,627	3,743
Interest rate, stated percentage																						3.00%			7.375%			6.875%	6.875%			6.75%	6.75%			7.80%										6.75%
Maximum Borrowing Capacity					900																																								240
Weighted Average Interest Rate (as a percent)				2.52%
Unused Credit				807
Short-term loans and long-term debt due within one year	356	406	345																																							276	281	233
Weighted Average Interest Rate, Short-term Debt (as a percent)																																										1.13%	2.41%	1.87%
Principal Amount																						690			600			388				647				250
Indicated Market Price (in dollars per share)																						$ 98.36			$ 114.63			$ 103.00				$ 111.38				$ 115.63
Fair Value																						$ 679			$ 688			$ 400				$ 721				$ 289