Debt	12 Months Ended
Dec. 31, 2017
Debt Disclosure [Abstract]
Debt	10. Debt On April 18, 2014, the Company entered into a five-year senior unsecured revolving credit facility with a syndicate of lenders, including Wells Fargo Bank, National Association, as the administrative agent. The credit facility became available to the Company on June 2, 2014 as a result of the satisfaction of customary conditions, including the consummation of the Separation. The credit facility is for an aggregate principal amount of up to $750 million with sub-facilities for standby letters of credit and swingline loans, each with a sublimit of $150 million and $50 million, respectively. The Company has the right, subject to certain conditions, to increase the aggregate principal amount of commitments under the credit facility by $250 million. Borrowings under the credit facility will bear interest at a base rate (as defined in the credit agreement) plus an applicable interest margin based on the Company’s capitalization ratio. The base rate is calculated as the highest of (a) the Federal Funds Rate, as published by the Federal Reserve Bank of New York, plus 1/2 of 1%, (b) the prime commercial lending rate of the administrative agent, as established from time to time at its principal U.S. office, and (c) the Daily One-Month LIBOR (as defined in the credit agreement) plus 1%. The Company also has the option for its borrowings under the credit facility to bear interest based on LIBOR (as defined in the credit agreement). The credit facility is unsecured and guaranteed by the Company’s domestic subsidiaries. The credit agreement also provides for customary fees, including administrative agent fees, commitment fees, fees in respect of letters of credit and other fees. The annual commitment fee ranges from 25 to 35 basis points of the unused portion of the credit facility. The line of credit expires in April 2019, unless extended. The credit facility contained usual and customary affirmative and negative covenants for credit facilities of this type including financial covenants consisting of (a) a maximum capitalization ratio (as defined in the credit agreement) of 50% and (b) a minimum interest coverage ratio (as defined in the credit agreement) of no less than 3:1. On January 20, 2016, the Company entered into an amendment (the “Amendment”) to its credit facility dated as of April 18, 2014 (the “Credit Agreement”). The Amendment, among other things, (i) suspends, until the Company elects otherwise, the Credit Agreement’s minimum interest coverage ratio effective as of December 30, 2015, (ii) adds a minimum asset coverage ratio (as defined in the Credit Agreement), which requires that the ratio of the value of the Company’s eligible assets (value of qualified cash, eligible inventory and eligible accounts receivable) to the amount of its outstanding obligations under the Credit Agreement is no less than 1.50 to 1.00, (iii) reduces the maximum capitalization ratio (as defined in the Credit Agreement) from 50% to 45%, (iv) increases the applicable interest margin on current borrowings by 75 basis points and the current commitment fee by 5 basis points and (v) reduces sub-facilities for standby letters of credit and swingline loans to $40 million and $25 million, respectively. In connection with the Amendment, the Company also entered into a Security Agreement dated as of January 20, 2016 (the “Security Agreement”) pursuant to which it granted the lenders under the Credit Agreement customary security interests in substantially all of the Company’s U.S. assets and in approximately 65% of the equity interests of the Company’s first-tier foreign subsidiaries. As of December 31, 2017, the Company had borrowed $162 million against its senior secured revolving credit facility, and had $429 million in availability (as defined in the Credit Agreement) resulting in the excess availability (as defined in the Credit Agreement) of 72%, subject to certain restrictions. Borrowings that result in the excess availability dropping below 25% are conditioned upon compliance with or waiver of a minimum fixed charge ratio (as defined in the Credit Agreement). The Company was not obligated to pay back the borrowing against the senior secured revolving credit facility until the expiration date of April 18, 2019, as such the outstanding borrowing is classified as long term. As of December 31, 2017, the Company was in compliance with all financial covenants in the credit facility. Total commitments under the amended credit facility are $750 million. The amended credit facility includes a $250 million accordion, subject to certain conditions. At December 31, 2017, the Company issued $6 million in letters of credit under its senior revolving credit facility primarily for casualty insurance expiring in July 2018.

10. Debt

On April 18, 2014, the Company entered into a five-year senior unsecured revolving credit facility with a syndicate of lenders, including Wells Fargo Bank, National Association, as the administrative agent. The credit facility became available to the Company on June 2, 2014 as a result of the satisfaction of customary conditions, including the consummation of the Separation. The credit facility is for an aggregate principal amount of up to $750 million with sub-facilities for standby letters of credit and swingline loans, each with a sublimit of $150 million and $50 million, respectively. The Company has the right, subject to certain conditions, to increase the aggregate principal amount of commitments under the credit facility by $250 million. Borrowings under the credit facility will bear interest at a base rate (as defined in the credit agreement) plus an applicable interest margin based on the Company’s capitalization ratio. The base rate is calculated as the highest of (a) the Federal Funds Rate, as published by the Federal Reserve Bank of New York, plus 1/2 of 1%, (b) the prime commercial lending rate of the administrative agent, as established from time to time at its principal U.S. office, and (c) the Daily One-Month LIBOR (as defined in the credit agreement) plus 1%. The Company also has the option for its borrowings under the credit facility to bear interest based on LIBOR (as defined in the credit agreement). The credit facility is unsecured and guaranteed by the Company’s domestic subsidiaries. The credit agreement also provides for customary fees, including administrative agent fees, commitment fees, fees in respect of letters of credit and other fees. The annual commitment fee ranges from 25 to 35 basis points of the unused portion of the credit facility. The line of credit expires in April 2019, unless extended.

The credit facility contained usual and customary affirmative and negative covenants for credit facilities of this type including financial covenants consisting of (a) a maximum capitalization ratio (as defined in the credit agreement) of 50% and (b) a minimum interest coverage ratio (as defined in the credit agreement) of no less than 3:1.

On January 20, 2016, the Company entered into an amendment (the “Amendment”) to its credit facility dated as of April 18, 2014 (the “Credit Agreement”). The Amendment, among other things, (i) suspends, until the Company elects otherwise, the Credit Agreement’s minimum interest coverage ratio effective as of December 30, 2015, (ii) adds a minimum asset coverage ratio (as defined in the Credit Agreement), which requires that the ratio of the value of the Company’s eligible assets (value of qualified cash, eligible inventory and eligible accounts receivable) to the amount of its outstanding obligations under the Credit Agreement is no less than 1.50 to 1.00, (iii) reduces the maximum capitalization ratio (as defined in the Credit Agreement) from 50% to 45%, (iv) increases the applicable interest margin on current borrowings by 75 basis points and the current commitment fee by 5 basis points and (v) reduces sub-facilities for standby letters of credit and swingline loans to $40 million and $25 million, respectively. In connection with the Amendment, the Company also entered into a Security Agreement dated as of January 20, 2016 (the “Security Agreement”) pursuant to which it granted the lenders under the Credit Agreement customary security interests in substantially all of the Company’s U.S. assets and in approximately 65% of the equity interests of the Company’s first-tier foreign subsidiaries.

As of December 31, 2017, the Company had borrowed $162 million against its senior secured revolving credit facility, and had $429 million in availability (as defined in the Credit Agreement) resulting in the excess availability (as defined in the Credit Agreement) of 72%, subject to certain restrictions. Borrowings that result in the excess availability dropping below 25% are conditioned upon compliance with or waiver of a minimum fixed charge ratio (as defined in the Credit Agreement). The Company was not obligated to pay back the borrowing against the senior secured revolving credit facility until the expiration date of April 18, 2019, as such the outstanding borrowing is classified as long term. As of December 31, 2017, the Company was in compliance with all financial covenants in the credit facility. Total commitments under the amended credit facility are $750 million. The amended credit facility includes a $250 million accordion, subject to certain conditions.

At December 31, 2017, the Company issued $6 million in letters of credit under its senior revolving credit facility primarily for casualty insurance expiring in July 2018.