Income Taxes	6 Months Ended
Jun. 30, 2013
Income Tax Disclosure [Abstract]
Income Taxes	7. INCOME TAXES Income tax provisions for interim (quarterly) periods are based on estimated annual income taxes calculated separately from the effect of significant, infrequent or unusual items. Income tax represented an expense of $23 million for the three months ended June 30, 2013 compared to an expense of $28 million for the three months ended June 30, 2012. The decrease in income tax expense was primarily driven by tax on a favorable mix of earnings offset by a less favorable change in uncertain tax positions. The three months ended June 30, 2012 included a favorable settlement with Japan for the 2001 through 2006 tax years which resulted in a $13 million tax benefit. Income tax represented expense of $25 million for the six months ended June 30, 2013 compared to expense of $35 million for the six months ended June 30, 2012. The change in income tax is primarily driven by tax on a favorable mix of earnings and favorable tax legislation offset by a less favorable change in uncertain tax positions. The six months ended June 30, 2013 included a one-time benefit of approximately $16 million in connection with the American Taxpayer Relief Act of 2012 that was signed into law in January 2013 and the related retroactive tax relief for certain law provisions that expired in 2012. The six months ended June 30, 2012 included a $13 million favorable settlement with Japan for the 2001 through 2006 tax years and a $14 million favorable settlement with the Canada Revenue Agency for the 2003 tax year.

Income Taxes

6 Months Ended

Jun. 30, 2013

7. INCOME TAXES

Income tax provisions for interim (quarterly) periods are based on estimated annual income taxes calculated separately from the effect of significant, infrequent or unusual items. Income tax represented an expense of $23 million for the three months ended June 30, 2013 compared to an expense of $28 million for the three months ended June 30, 2012. The decrease in income tax expense was primarily driven by tax on a favorable mix of earnings offset by a less favorable change in uncertain tax positions. The three months ended June 30, 2012 included a favorable settlement with Japan for the 2001 through 2006 tax years which resulted in a $13 million tax benefit.

Income tax represented expense of $25 million for the six months ended June 30, 2013 compared to expense of $35 million for the six months ended June 30, 2012. The change in income tax is primarily driven by tax on a favorable mix of earnings and favorable tax legislation offset by a less favorable change in uncertain tax positions. The six months ended June 30, 2013 included a one-time benefit of approximately $16 million in connection with the American Taxpayer Relief Act of 2012 that was signed into law in January 2013 and the related retroactive tax relief for certain law provisions that expired in 2012. The six months ended June 30, 2012 included a $13 million favorable settlement with Japan for the 2001 through 2006 tax years and a $14 million favorable settlement with the Canada Revenue Agency for the 2003 tax year.